Since you mentioned a "rar" file, you will need specific software to open it after downloading, as Windows does not always support this format natively: The standard utility for .rar files.
To help you with downloading drivers or software for a Dell Inspiron 1525,
If you are looking for the driver, you can find various versions depending on your operating system:
A free, open-source alternative that handles RAR, ZIP, and other compressed formats. Security Warning
Be cautious when downloading .rar or .zip files from unofficial third-party sites, as these are common vectors for malware. Always scan downloaded files with updated antivirus software before extracting them.
While Dell may not provide official Windows 10 drivers for this legacy model, compatible versions are often hosted on driver repositories like DriverIdentifier .